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[" 8.If "P(n)=cos^(n)theta+sin^(n)theta"...

[" 8.If "P_(n)=cos^(n)theta+sin^(n)theta" and "Q_(n)=cos theta-sin theta," then which of the following is/are true."],[[" (A) "P_(n)=cos^(n)theta+sin^(2)theta cos^(2)theta_(n-4)," (B) "Q_(n)-Q_(n-2)=-sin^(2)theta cos^(2)theta Q_(n-4)],[" (C) "P_(4)=1-2sin^(2)theta cos^(2)theta," (D) "Q_(4)=cos^(2)theta-sin^(2)theta]]

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